baber/WOPTO huggingface dataset:
Patent GB-1201684-A (GB)
Title: Improvements in temperature indication systems
Inventor: VENNING SELBY GREGORIE
IPC: G05D23/19
Filed: 1968-02-15
Abstract: 1,201,684. 684. Automatic temperature control systems. GENERAL ELECTRIC CO. Feb.15, 1968 [March 9, 1967], No.7499/68. Heading G3R. An automatic temperature control system comprising a temperature sensor 11, and a reference 19 which are compared to derive a difference value which is applied to control a heater 13, has a source of re-current pulses, proportional in number to the difference value, which supplies a digital to analogue converter the output of which is compared with the difference value so that the number of pulses indicates the magnitude of the difference signal. The output of sensor 11 e.g. a thermistor is amplified at 15 producing a negative output which is compared with a positive signal of a reference arrangement 19. Depending on whether the amplifier 15 output is greater or less than that of reference 19 a difference of corresponding sign is passed through a reversing amplifier 21 to a thyristor firing circuit 23 causing a thyristor 25 to fire if the input signal is negative. The difference signal is only passed to the firing circuit 23 during certain periods of each half cycle on a time division basis and during other parts of each half cycle high and low temperature circuits 27, 29 are connected on alternate half cycles to give visual indication of whether the temperature is outside a determine range. Wider limits than those set by circuits 27, 29 may additionally be detected by circuits 55, 57. The timing is performed by a circuit 45 comprising a pulse oscillator which is muted for short time after each A.C. cycle passes through zero. The first pulse activates circuit 23 causing the thyristor 25 to be fired if the temperature is low. The oscillator is then muted for another short period during which the circuit 23 is disabled and an alarm circuit 31 is connected. If the half cycle involved is of positive polarity high limit circuit 27 is also connected to the junction 17, conversely if the half cycle is of negative. polarity the low limit circuit 29 is so connected. The actual temperature deviation may be displayed by a unit 41 which counts pulses received from the timer 45, the deviation signal being obtained at the same time as the high and low circuits 27, 29. This circuit may be activated manually. An output from the temperature deviation counter 37 is converted at 39 into an increasing analogue value which is applied to the junction 17 where it is compared with the output from amplifier 15. At some point the signals will be equal at which time amplifier 21 will cause the counter 37 to turn off. The pulses applied to converter 39 are also applied to a display unit 41, the value displayed on which will be equal to the number of pulses counted. The arrangement may be applied to a threephase system in which a plurality of sensors 55- 57 may control a plurality of heaters (not shown) sequentially also on a time division basis.
Patent GB-782385-A (GB)
Title: Improvements in loom harness
Inventor: KAUFMANN JOHN JACOB
IPC: D03C9/06
Filed: 1955-03-15
Abstract: 782,385. Heald frames. STEEL HEDDLE MANUFACTURING CO. March 15, 1955, No. 7558/55. Class 142(2) An intermediate support for a heddle bar 17 comprises a bracket 43 carried by screws 31 passing though a slot 30 in the edge of a rail 10 and screwed into a block 33 slidable in grooves 32, a spring 42 being interposed between the .bracket and the rail; in the case of a wooden rail, wood screws are used, screwed directly into the rail. The bracket is slit and pressed to provide channels 44, 45 which embrace a tongue 46 (cranked to lie parallel with the heddle bar), the channels 45 surrounding the front of the tongue and the channel 44 the rear. Specifications 673,282 and 673,434 are referred to.
Patent GB-418297-A (GB)
Title: Improvements in and relating to electric converting systems
IPC: H02M5/00
Filed: 1933-03-13
Abstract: 418,297. Converting; motors. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Alexanderson, E. F. W. ; 8, Adams Road, Schenectady, New York, U.S.A.) March 13, 1933, No. 7606. Convention date, March 12, 1932. [Classes 35 and 38 (ii).] Machines with vapours or like rectifiers in place of commutators.-Relates to a frequency changer in which means are provided for varying the output frequency and has particular application to the speed control of an A.C. motor. The phase winding 12, Fig. 1, of a synchronous motor 11 is connected to an A.C. supply 10 through two full-wave rectifiers comprising valves 15, 16 and 17, 18, and the phase winding 13 is connected through two full-wave rectifiers 19, 20 and 21, 22 connected in the reverse direction to the first two. The centre points of the windings 12, 13 are interconnected through the armature field winding 14. The rectifiers are controlled so that in each phase winding, current flows alternately through the two parts, thus producing an alternating flux in the core. These fluxes are out-of-phase and produce a rotating field. The current flow is from the line through one of the rectifiers associated with the winding 12 and back to the line through one of the rectifiers associated with the winding 13 so that a pulsating direct current flows through the winding 14. The machine will therefore function as a synchronous motor. Two methods of grid control are described. In one method transformers 23-26 in the grid circuits are periodically connected to a bridge 30, energized from the supply 10, by means of a commutator 42 driven by the motor 11. By varying the resistance 33 of the bridge 30 the phase of the grid potentials with respect to the anode potentials can be varied to regulate the current flowing and thereby the speed of the motor. An additional adjustment of speed can be obtained by means of a variable resistance 55 shunting the field winding 14. This type of grid control is most satisfactory at frequencies less than half the supply frequency. For higher frequencies, the grids are controlled by means of transformers 44-51 supplied from a phase shifting transformer 53, 54 the primary of which is connected across the phase windings 12, 13. Short circuiting switches 52, 43 are provided so that the grid control not in use can be disconnected and the grid transformers shortcircuited. In a modification a 3-phase supply is used and in a further modification the motor has a 6-phase winding. In a further modification, Fig. 2, an induction motor of the squirrel cage type is supplied. The phase windings 63, 64 are interconnected through a reactance 65. To ensure the commutator 42 running at synchronous speed, it is driven from the motor 61 through a differential gear 66 the movable member of which is driven by an auxiliary motor 66a to compensate for slip. Reference has been directed by the Comptroller to Specification 395,917.
Patent GB-1303303-A (GB)
IPC: C09D11/00
Filed: 1970-02-17
Abstract: 1303303 Electrically-conductive aqueous ink MEAD CORP 17 Feb 1970 [18 Feb 1969] 7649/70 Heading C4A An aqueous electrically-conductive ink capable of formation into discrete droplets and substantially free of particulate material comprises 0À1-5% by wt. of (i) a water-soluble dye, 1-20% of (ii) a water-soluble electricallyconductive inorganic material, and 5-50% of (iii) a water-soluble low molecular weight polyol. Compound (ii) must be compatible with dye (i) in that it must not precipitate the dye. The ink may also contain 5-20% of (iv) a water-soluble cystallizable organic material which is a temporary plasticizer for cellulose, (v) 1-3% hexanetriol, and (vi) glucono dlactone or calcium nitrate to inhibit reaction with stainless steel or nickel respectively. The polyol (iii) may be glycerol, or ethylene, diethylene or triethylene glycol. The inorganic compound (ii) may be a chloride of Zn, Al, Ca, Mg, K, Sr, Mn, Cu, Ni, Na or Co and/or Ca, K or Na nitrate, or boric acid. The organic cystallizable compound (iv) may be urea, thiourea, acetamide, glucose, sucrose, fructose, a thiocyanate, or a urea-aldehyde derivative. The ink has a surface tension of 35-70 dynes/ cm., and may have a pH of 3-8À5, adjusted, o.g. by sulphamic acid (Example 2). In a high speed printing system the ink is deposited on paper as discrete droplets of 3-5 mils. diameter at a rate of 10,000 to 1,000,000 per second, and information is recorded by deflection of some of the droplets by an electric charge. The ink is said to produce a non-cockled print.
Patent GB-216103-A (GB)
Title: A process for the protection of metal parts of plant in conducting communication with the earth through streams of water against the harmful influences of stray currents, and apparatus for carrying out the process
IPC: B60M5/00
Filed: 1924-03-26
Abstract: 216,103. Wurstemberger, F. von. May 14, 1923, [Convention date]. Incrustation and corrosion, preventing. - In order to avoid corrosive effects of stray earth currents, from an earthed electric distribution network, .on the pipes and machine parts in electric power stations, the metal part to be protected is made cathodic by diverting the stray currents so that the potential of the protected part is somewhat below that of the adjacent metal parts and the earth or water, without attaining the potential of the return pole of the source. In this way the, corrosive action is diverted from the protected part to other parts of the mass of the plant. In an arrangement for a traction system, the condenser 10, Fig. 2, to be protected is insulated from the metallic masses M by a coat of oil colour, or by insulating washers 30, between the connected parts, and is electrically connected through a regulating resistance 31 with the return pole of the generator. In consequence, the condenser 10 instead of being anodic is rendered cathodic relative to the water 33, and corrosive action is avoided. The dotted lines indicate the directions of the stray earth currents which, by the arrangement described, become reversed through the condenser. In a modification, the anode current from the mass M is diverted to a seperate anode arranged in the stream of water and the corrosive action is confined to this anode.
Patent GB-1261248-A (GB)
Title: Composite containers
IPC: B65D23/00
Filed: 1969-02-13
Abstract: 1,261,248. Composite construction containers. OWENS-ILLINOIS Inc. 13 Feb., 1969 [13 Feb., 1968], No.7739/69. Addition to 1,185,901. Heading B8D. A composite construction container of the kind claimed in claim 1 of the parent Specification is characterized in that the single-walled glass body 51 is circular throughout in section perpendicular to an axis of rotational symmetry and comprises, in addition to the substantially continuously convexly arcuate bottom portion 51a, a contiguous cylindrical portion 51b of substantially equal axial extent and of a diameter equal to the maximum diameter of the body, and a convexly tapering portion 51c extending between the cylindrical portion 51b and a concavely curved minimum diameter neck portion 52 and having an axial extent substantially equal to the combined axial extents of the bottom and cylindrical portions 51a, 51b, the neck portion 52 having a flared portion 53 which terminates in a lip 54. The base 70, which is in the form of a cup, extends over the base of the body and at least up to the converging portion 51b of the body and may be secured to the latter by heat shrinking, or an adhesive. The base of the cup comprises an outer annulus 72 with a yieldable wall 73 which is connected to a concave body supporting-portion 74. The latter has pressed out downwardly therefrom an interrupted circular array of ribs 74a each with end walls 74c, the ribs normally extending above the base of the annulus 72. When a force is applied vertically downwardly upon the neck 52, for instance during capping, the wall 73 allows the grooves 74a to descend on to a supporting surface and provide a back-up for the applied force. The base has vent holes 74b which can be closed by placing spots of adhesive on outer surface of the lower surface 51a of the body before it is introduced into the cup. In a modification, Fig. 4 (not shown), the inwardly facing wall (83) on the base annulus (82) is connected to a raised flat bearing support surface (84) which also provides a surface for stacking composite containers.
Patent GB-568605-A (GB)
Title: Improvements in storage bins, silos and the like
IPC: E04H7/28
Filed: 1943-05-17
Abstract: 568,605. Storage bins, silos, &c. TARRAN, D. G. May 17, 1943, No. 7821. [Class 20 (i)] A storage bin, silo, &c. is formed of a number of similar pre-cast concrete, or reinforcedconcrete slabs 1 having integral flanges 4 and ribs 3, the slabs being assembled in a ring with interposed pre-cast concrete upwardly tapering buttress-elements 10 having a height at least twice the base dimension, bolts 14 passing through the flanges on the slabs and a portion 11 of reduced thickness on the buttress element to couple the rings and buttress elements together. The slabs in the tapering lower portion of the silo have one sloping and one perpendicular edge face, but the silo may be extended upwards by slabs having both horizontal edges perpendicular to the plane of the slab. The slabs are connected vertically by bolts passing through the flanged edges. The bottom ring may be secured to a concrete base by rag bolts. The inner face of the slabs may be of arcuate form to form a truly cylindrical silo. The outer edges of the buttress elements are vertical, so that the radial dimension of the silo is substantially constant throughout its height.
Patent GB-503277-A (GB)
Title: Improvements in articles of furniture such as bed-chairs and bed-settees
IPC: A47C17/22
Filed: 1938-03-14
Abstract: 503,277. Bed-settees &c. FRECH, C., and NILSSON, J. E. ,March 14, 1938, No. 7831. (Class 52 (ii)] A chair convertible into a bed is provided with folding legs each consisting of two parts hinged together which are extended when the chair is converted into a bed. An extension section forming the foot of the bed carries means for extending the legs which are not operated till the extension section has been swung through an initial predetermined angle, the pivot of the extension section being then automatically transferred from one point to another. Further morement of the extension section erects the legs and raises the main frame. Fig. 3 shows the article in the form of a chair. At the bottom of each side of the chair is a box 2 above which is a box 10; both boxes being hinged at different points 12, 13 to an arm 11. Wire mattresses 4, 8 are fixed to the lower and upper sections of the chair, the folding legs 21 being housed in the boxes, 2. To convert the chair into a bed, the top section is swung about the hinge 13, the arm 11 remaining stationary till the top section has reached the position shown in dotted lines. The floor of the box 10 then abuts against the arm 11 and further movement of the top section rotates the arm 11 about the hinge 12 and extends the folded legs through linkwork 32 and raises the mattress 4 into the position shown in Fig. 6. Legs 43 concealed in the chair back are also projected to form front legs for the bed when the arm 11 rotates about the hinge 12. In order to ensure uniform movement of the legs 21, the pivots at their lower ends are formed with toothed sectors 21c as shown in Fig. 8 which engage threads on spindles.26a connecting the rear and front legs. Springs 29 within the legs retain them in the folded and extended positions.
Patent GB-1374817-A (GB)
Title: Method of joining a pair of silicon nitride parts
IPC: C04B37/00
Filed: 1971-03-24
Abstract: 1374817 Ceramic seals JOSEPH LUCAS Ltd 8 March 1972 [24 March 1971 21 May 1971] 7874/71 and 16452/71 Heading B3V [Also in Division C1] Silicon nitride parts 14, 15 are joined together by a glass solder provided on at least one of them, the glass in powder form containing oxides of silicon, aluminium and an alkaline earth metal. Examples of the glass are percentages by weight (a) silica 50-80%, alumina 10-40%, magnesium oxide 10-25%, (b) silica 15-63%, aluminall-53%, calcium oxide 11-50%, (c) si'ica 18-50%, alumina 10.. 37%, barium oxide 30-65%. Other examples are v silica 64%, alumina 10%, magnesium oxide 26% and silica 66%, alumina 5% and magnesium oxide 29%. The parts 14, 15 to be joined by the glass 16 in an inert atmosphere of nitrogen or argon are first ground along the edges to be joined and placed on a graphite pedestal which is heatedby a watercooled induction coil. The fused glass flows into the gap between the parts 14, 15. Alternatively, the glass powder may be mixed with water to form a paste applied to one of the parts, which are preferably pressed together during joining. An oxyacetylene torch may be used instead by a furnace. The glass may be formed initially by forming a mixture of metal oxides, or it may be composed of compounds, e.g. a mixture containing ethyl silicate, magnesium carbonate and aluminium hydroxide may be fused to produce the glass. Alternatively, the mixture may contain ethyl silicate, magnesium carbonate and aluminium hydroxide, or olino-enstatite and aluminium hydroxide. Also, compounds of magnesium oxide and alumina and of silica and alumina may provide some constituents of the glass, cordierite (2 MgO.2Al 2 O 3  ... 5SiO 2 ) may be fused directly into a suitable glass.
Patent GB-161807-A (GB)
Title: Means for varying the compression in internal combustion engines
IPC: F02B75/04
Filed: 1920-03-17
Abstract: 161,807. Halton, S. M. March 17, 1920. Regulating.-To vary the clearance, the piston is connected to an adjustable crank-shaft mounted in a pair of arms 2 pivoted on a cam shaft 3 and carrying at their ends remote from the shaft 3 a pair of screwed eyes, in which engage spindles 9 actuated by a worm and worm wheel. The cam shaft is geared by wheels 19, 20 to the crank-shaft, and a magneto 21 is driven frcm the cam shaft through chain gearing 23, 24. Adjustment of the crank-shaft simultaneously adjusts the cam shaft and the magneto for the altered conditions of running.
Patent GB-173179-A (GB)
Title: Golf stroke counter
IPC: A63B71/06
Filed: 1921-03-12
Abstract: 173,179. Deichmann, A. March 12, 1921. Scoring and marking apparatus.-A device for scoring golf strokes comprises a number of indicating discs arranged side by side and pressed together by a spring. The adjacent faces of the discs are corrugated so that the discs when rotated snap into position. In the form shown in Figs. 1 and 3, the indicating discs a are mounted on a tube b and are pressed together by means of a spring d and end pieces c. One disc e carries only an indicating mark f, the discs on the right thereof being provided for marking the score for each hole whilst the discs on the left score the total strokes. In a modification, the tube b is replaced by a central spindle and the spring is situated at one end.
Patent GB-565208-A (GB)
Title: Manufacture of lactones
IPC: C07D315/00
Filed: 1942-06-10
Abstract: Lactone groups are introduced into carbonyl compounds by condensing a mono-halogen lactone with a saturated or unsaturated aldehyde or ketone in the presence of a bi-valent metal as a condensing agent. The halogen atom may be on the a -carbon atom of the lactone or on a carbon atom more remote.  Condensing agents mentioned include zinc, magnesium and calcium.  The products of the invention are oxy-compounds.  These products may be modified by subsequent treatment with lactonising or reducing agents or agents which split off water.  The process of the invention is particularly applicable to the formation of genins of the cardiac poisons by condensation of halogen lactones with ketones of cyclopentano-polyhydrophenanthrene series.  In examples: (1) trans-dehydroandrosterone is condensed with chlorobutyrolactone in the presence of a condensing agent prepared by causing magnesium in ether to react with one drop of methyl iodide in the presence of iodine.  There is thus obtained D 5 : 6, 20 : 22-3-acetoxy 21-oxynor choladienic acid lactone.  The same product may be prepared using b -dihalogenbutyrolactone and afterwards converting the primarily formed oxido-, halogen hydrin- or oxy - compounds to the corresponding unsaturated compound.  Using pregnenolone acetate as the ketone component there is obtained a  - [D 5 - 3 - acetoxy - pregnenyl - 20] D a  : b -butenolid.  (2) Acetone and b -chlorobutyrolactone are condensed using the same condensing agent as in example (1) to give b  - isopropyl - g  - butyrolactone.  (3) Acetophenone is condensed with a -chlorobutyrolacetone in the presence of dry zinc powder to form a  - [a 1-phenyl-ethylidine] - butanolid.  (4) Citronellal is condensed with a -chlorobutyrolactone in the presence of zinc to give a -citronellidene-butyrolactone.  If there is used as the ketone component methylheptanone under similar conditions, there is obtained a -(b 1-oxyethyl) geranic acid lactone.  Alpha-chloro-butyrolactone is prepared by chlorinating butyrolactone-a -carboxylic ester with sulphuryl chloride, acid saponification and decarboxylation.  The bromo - compound is similarly obtained, and the iodo-compound by reacting a -chlorobutyrolactone with potassium iodide.  The Specification as open to inspection under Sect. 91 comprises also the treatment of lactones which contain more than one halogen atom, and also the use of carbonyl compounds in general and is not restricted to the use of aldehydes and ketones.  In addition, the use of aldehyde and ketones which are substituted by heterocyclic nuclei are included.  The use of additional condensing agents is also described, agents mentioned including metal alcoholates or amides, alkali metals, and alloys (especially amalgams) thereof with other metals. By means of these additional condensing agents there may be obtained in addition to oxy-compounds also oxido-compounds and halogen hydrin derivatives.  This matter is not contained in the Specification as accepted.
Patent GB-704469-A (GB)
Title: Improvements in and relating to blocking oscillator circuits
Inventor: VOYCE ALBERT MEREDITH MORGAN
IPC: H03K3/16
Filed: 1951-04-05
Abstract: 704,469. Pulse generating circuits. ENGLISH ELECTRIC CO., Ltd. April 4, 1952 [April 5, 1951], No. 7934/51. Class 40 (6) The duration of the pulses generated by a blocking oscillator is varied by variation in opposite senses of the coupling between the control grid of the blocking oscillator valve and sources of positive and negative feedback voltage. The Figure shows a blocking oscillator in which positive feedback is applied from the anode circuit to the control grid of valve V via the right hand section of the variable capacitor C1 and negative feedback via the left hand section so that on varying capacitor C1 the amounts of positive and negative feedback vary simultaneously and in opposite senses. The pulse'duration which is decreased as the positive feedback is reduced and the negative feedback is increased and vice versa may thus be adjusted by varying capacitor C1. The oscillator may be triggered by pulses applied at terminal A and output pulses may be taken from terminals 01, 02 or from the cathode or screen grid circuits.
Patent GB-707029-A (GB)
Title: Improvements in or relating to wide band thermionic valve amplifiers
Inventor: WRIGHT WILLIAM LEA
IPC: H03F1/50
Filed: 1952-03-28
Abstract: 707,029. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 2, 1953 [March 28, 1952], No. 8023/52. Class 40 (6) In a wide band amplifier comprising three resistance-capacity coupled stages with overall negative feedback provided by returning the cathode circuit of the last stage V3, to the cathode of the first VI, the resistances CR1, 2 being in common, excessive phase-lag at upper frequencies, causing instability, is avoided by means of a secondary feedback path comprising a condenser FC connected between the cathode of the stage V3 and the grid of stage V2. The condenser FC may alternatively be connected between the anode and grid of the stage V2, Fig. 2 (not shown).